Needle-stripper foot for sewing machines



NEEDLE STRIPPER FOOT F'OR SEWING MACHINES Filed Sept. 7, 1953 Ma rtinHem Zeb Wwneam needle-stripper foot is'substituted' for the regu-Patented Nov. 20, 1934 v l inure]: STATES PATENT; ormce v @Eo smog TFonsEwmG Mmmnommb, Elizabeth, N. J., assignor to'zThe ,"Singer'Manufactm ing Company, Elizabeth;

N. J a corporation of New Jersey V i Application September 7, 1933,Serial No: 688,423

Claims. (01. nae-236) This invention relates to improvements in that thework is not properly controlled by the needle-stripper foot devices forsewing machines foot during the time that the needle-thread loop moreparticularly adapted for darningand emis being drawn up to set thestitches, because it broidering purposes, and has for an object to is atthat time that the foot is raised from the 5 improve the stitch-forming:conditions incidental work. The needle-stripper foot according to the 80to the employment of aneedle-str'ipper foot depresent invention isdesigned to control the work signed to permit manual shifting of thework more efficiently and, nevertheless, permit of raisduring thedarning or -embroidering operation. ing the foot manually in the usualmanner for Another object of thisinvention is to provide insertion andremoval of the work.

a stripper-foot which, while so designed as to ef- Referring 'to thedrawing, a sewing machine 66 iectively control the work or the enchainedto which the improved stripper-foot has been thread-loops whiletheneedle is out of the work, applied, has a work-support including theusual may be raised into an inoperative position without throat-plate 1provided with a needle-aperture incurring the liability of breakage ofparts should 2 and with feed-slots, as 3, through which operthe machinebe inadvertently started in theraised ates a feed-dog 4. Forembroidering or darning l0 position of the stripper-foot r V purposes,the work may be supportedand shield- The features ofthe invention willbe undered from the feed-dog 4 bymeans of a coverstood from aninspection of the accompanying plate 5 which overlies thethroat-plateand may drawing and the following detailed description of besecured thereto in any usual manner. An

; a preferred embodiment of the improved needleexpedient well known inthe art as a substitute 75 stripper foot illustrated therein. for thefeed-dog cover-plate involves the pro- In the drawing, Fig. 1 is a frontside elevation, vision of meanswhereby the feed-dog does not with thework-support in section, of a portion of p oject above the usualthroatepla during J asewing machine to which/the improved attachp r ionof the ma h n i is h refore to ment has beenapplied, the stripper-footbein be understood that the present invention is not so shown i n rm loperative position, Fi 2 limited to the employment of a feed-dog coverisafront end elevation, with the work-support in p at section, of theparts shown in Fig. 1, but with Overhangi the wo pp rt is t .u ual thestripper-foot raised into inoperative position tm terminating at itsfree n in a h d and with theneedle-bar down. Fi '3 i n 6,in whicha-needle-bar 7 is. journaled for ver- 5 I larged front side elevation ofthe attachment, tical reciprocation. The lower end ofthe needlewith thestripper-foot illustrated in dotted li bar 7 carries a clamp 8 in whichis secured the as depressed in itssupporting member. Fig. 421s shank ofa needle 9 in t p s t s a an m f t plan i of th tt h t, a thread-guide10 projecting from the under side with the presser-bar in section. Fig.5 is a front of said clamp. Any sui a le mechanism may be no endelevation, partly in section, of aportion of the employed below the t-P1 as complehead of t ewing machine t; a n of mentary to the needle inthe formation of stitches. f Dresser bar journaled therein Fig; 6 1- m-Journaled for vertical movement in the bracksents enlarged and separateperspective view f et-armhead6 is the usual presser-bar 11 of which e am t the upperbearing comprises an adjustable bush- 5 'w employing sewingmachine f ing 12 serving as an adjustable abutment for the broidering ordarning purposes, it has been a co u p end of a p in 3 i d about the Pes rmon practise to adaptthe machine to permit of ba T lower h 'e eSpring 13 b a s a ainst 's'hifti'ng'the work manually, betweensuccessive a collar 14 elhtably fiifed pq t e Presser-bar, needlereciprocations. To this end, various exsaideollar mep g with avleterallypedients have heretofore been employed to lift'the tehdmfg 8 15 Whichoverlies the cam-edge ofthe presser foot intermittently or to hold itraisedso usual hftel: lever iii-end depressed e ea t, that the work isfreeto be shifted; In one form by the p g I of the devices more commonlyemployed, a special I T Dresser-i001? usually p y de S tching operationsis in thepresent case detached lar presser-foot of the machine, whichstripperfrom the lower end of the presser-bar 11, and foot is designedto yieldingly engage th w k substituted for said. presser-foot is anattachduringthework-penetrating movements of the merit more particularlyadapted for embroidering needle and is raised while the needle-is out ofand darning purposes. This attachment com- 5 the. work. .This expedienthas the disadvantage prises an angular supporting member 1'7 shaped n topartly embrace the slabbed lower end of the presser-bar 11, one wall ofsaid member 1'7 having a vertically elongated slot 18 receiving theusual presser-foot securing screw 19 and providing for verticaladjustment of said supporting member upon the presser-bar. Asillustrated more particularly in Fig. 6 of the drawing, a slot 20 is outinto the rear wall of the supporting memher to open into the verticallyelongated slot 18,

whereby said supporting member may be applied 1 to or detached from thepresser-bar without completely unthreading the screw 19.

The front wall of the supporting member 17 is formed or otherwiseprovided with reversely bent and spaced guide-lips 21 and 22, whichtogether with said front wall define a vertical guideway. Verticallyslidable in said guideway of the supporting member 17 is the flat shank23 of a needle-stripper foot 24 extending forwardly from said shank andprovided with a needle-aperture 25. A shoulder 26 projects from thelower end of a side edge of the stripper-foot shank 23 in position toengage the lower end of the guide-lip 22, said shoulder 26 constitutinga stop limiting upward movement of the stripper-foot in its guideway. Aspring 27 having one end entering an aperture 28 in the upper edge ofthe supporting member 17 and its other end entering an aperture 29 inthe shank 23 of the stripper-foot acts to hold the shoulder 26yieldingly against the lower end of the guide-lip 22, i. e., the spring2'? acts to raise the stripper-foot a limited extent in the supportingmember guideway and to support said foot in its operative position.

When applying the attachment to the presserbar, the supporting member 17of the stripperfoot is vertically adjusted into a position such that thestripper-foot is spaced from the worksupport of the machine justsufiiciently to permit of manual shifting of the work between successiveneedle reciprocations, the stripper-foot being sustained againstdownward movement by the spring 27 which yieldingly holds thestripperfoot at its upper limit of movement in the supporting member ofthe foot. In this position of the stripper-foot 24,- the-work is heldefiectively against excessive response to the drawing action of thethread while the needle is out of the work. Should an undue thickness ofwork be presented under the stripper-foot, the latter mayrespond theretoby an upwardly yielding movement of the presser-bar. When thestripper-foot is raised into its inoperative position by manipulation ofthe presser-bar lifter-lever 16, said stripper-foot is disposed in thepath of movement of the needleclamp 8 and of the thread-guide 10 carriedthereby, because of the initially raised position of the stripper-footwhile in its operative position. However, the provision of thestripper-foot sustaining spring 27 permits of a downward yieldingmovement of the stripper-foot when engaged by the needle-clamp in aninadvertent operation of the machine, thereby obviating breakage ofparts.

Having thus set forth the nature of the invention, what I claim hereinis:

1. An attachment for sewing machines comprising, a supporting member, aneedle-stripper foot mounted upon said supporting member for verticalmovement thereupon, a stop limiting the upward movement of said footupon said supporting member, and a spring yieldingly urging upwardmovement of said foot.

2. An attachment for sewing machines comprising, a supporting memberhaving a vertical ed upon said supporting member for vertical movementthereupon, a stop limiting upward movement of said foot upon saidsupporting member, and a spring interposed between said supportingmember and foot yieldingly acting to hold said foot at its upward limitof movement.

4. In a sewing machine, a reciprocatory needlecarrier, a work-support, aneedle-stripper foot, and supporting means for said needle-stripper footincluding a spring yieldingly acting in a direction away from saidwork-support to hold said foot in spaced relation to the work-supportthroughout complete reciprocatory movements of said needle-carrier.

5. In a sewing machine, a needle-carrier, a work-support, aneedle-stripper foot, supporting means for said needle-stripper footincluding a spring yieldingly acting in a direction away from saidwork-support to hold said foot in spaced relation to the work-support,and adjustable mean for determining the spaced relation of said foot andwork-support.

6. In a sewing machine, a needle-carrier, a work-support, a presser-barmovable toward and from said work-support, a needle-stripper footmounted upon said presser-bar for movement thereupon toward and from thework-support, and a spring acting upon said foot in a direction awayfrom said work-support.

7. In a sewing machine, a needle-carrier, a work-support, a presser-barmovable toward and from said work-support, means for limiting themovement of said presser-bar toward the worksupport, a needle-stripperfoot mounted upon said presser-bar for movement thereupon toward andfrom said work-support, a spring yieldingly acting to move saidneedle-stripper foot upon said presser-bar in a direction away from saidWork-support, and a stop limiting the movement of said needle-stripperfoot under the action of said spring.

7 8. In a sewing machine, a needle-carrier, a work-support, apresser-bar movable toward and from said work-support, means forlimiting the movement of said presser-bar toward the work-support, aneedle-stripper foot mounted upon said presser-bar for movementthereupon toward and from said work-support, a stop limiting themovement of said foot in a direction away from said work-support,yielding means acting to hold said foot at its limit of movementdetermined by said stop, and adjustable means for determining theoperative position of said stop.

9. In a sewing machine, a needle-carrier, a work-support, a presser-barvertically movable toward and from said work-support, means for limitingthe movement of said presser-bar toward the work-support, a supportingmember secured for vertical adjustment upon said presser-bar andprovided with a vertical guideway, a needlestripper foot slidinglymounted in said guide- Way, a stop for limiting movement of said footupon said supporting member in a direction away from said work-support,and yielding means acting to hold said foot at its limit of springyieldingly depressing said presser-bar in a movement determined by saidstop and in spaced relation to said work-support.

10. In a sewing machine, a work-support, a reciprocatory needle-carrier,a presser-bar, a

direction toward the work-support, means limiting the extent of movementof the presser-bar spaced relation to said work-support.

MARTIN HEMLEB.

